CH141766A - Process for the preparation of an alkaline cotton dye of the stilbene series. - Google Patents

Process for the preparation of an alkaline cotton dye of the stilbene series.

Info

Publication number
CH141766A
CH141766A CH141766DA CH141766A CH 141766 A CH141766 A CH 141766A CH 141766D A CH141766D A CH 141766DA CH 141766 A CH141766 A CH 141766A
Authority
CH
Switzerland
Prior art keywords
orange
preparation
yellow
dye
alkaline
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH141766A publication Critical patent/CH141766A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B56/00—Azo dyes containing other chromophoric systems
    • C09B56/04—Stilbene-azo dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur     Darstellung    eines     all;aliechten        Baumwollfarbstoffes    der     Stilbenreihe.            Es    wurde gefunden, dass     inan    zu einem       alkaliechten        Baumwollfarbstoff    -der Silben  reihe gelangen kann, wenn man das gelb  orangefärbende Kondensationsprodukt der       pp'-Dinitrostilben-oo'-disulfosäure        finit        Sulf-          anilsäure-azo-m-toluidin    mit einem Oxyda  tionsmittel,     beispielsweise        Hypochlorit,    be  handelt.

    



  <I>Beispiel:</I>  50 kg des nach dem deutschen Reichspatent       N'r.    2049.12 hergestellten gelborange färben  den Kondensationsproduktes aus     pp'-Dinitro-          stilben-oo'-disulfosäure    und     Sulfanilsäure-          a.zo-m-toluidin    werden in     200    Liter Wasser  und 5 kg Soda aufgekocht, auf<B>30'</B> gekühlt  und mit 200 Liter 10     %        iger        Natriumhypo-          chloritlösung    versetzt, im     Verlauf    einiger  Stunden bis zum Kochen erwärmt,

   mit Salz  säure neutralisiert und der entstandene Farb  stoff     ausgesalzen.     



  Der Farbstoff stellt ein orangerotes Pul  ver dar, löst sich in Wasser mit     gelboranger       Farbe und wird von Schwefelsäure mit  blauvioletter Farbe aufgenommen. Er färbt  Baumwolle in rein     gelborangem    Farbton.  die Färbungen sind     alkaliechter    und klarer  als diejenigen des Ausgangsmaterials.



  Process for the preparation of an all-alike cotton dye of the stilbene series. It has been found that inan an alkaline cotton dye of the syllable series can be obtained if the yellow-orange condensation product of pp'-dinitrostilbene-oo'-disulfonic acid is finite sulfanilic acid-azo-m-toluidine with an oxidizing agent, for example hypochlorite , treats.

    



  <I> Example: </I> 50 kg of the according to the German Reich patent No. 2049.12 produced yellow-orange color the condensation product of pp'-dinitro-stilbene-oo'-disulfonic acid and sulfanilic acid-a.zo-m-toluidine are boiled in 200 liters of water and 5 kg of soda, cooled to 30 ' and mixed with 200 liters of 10% sodium hypochlorite solution, heated to a boil over the course of a few hours,

   neutralized with hydrochloric acid and salted out the resulting dye.



  The dye is an orange-red powder, dissolves in water with a yellow-orange color and is absorbed by sulfuric acid with a blue-violet color. It dyes cotton in a pure yellow-orange shade. the colorations are more alkaline and clearer than those of the starting material.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines alkali- echten Stilbenfarbstoffes, dadurch gekenn zeichnet, dass man das gelborange färbende Kondensationsprodukt, das durch Kondensa tion von pp'-Dinitrostilben-oö -disulfosäure mit Sulfanilsäure-azo-m-toluidin gewonnen werden kann, mit einem Oxydationsmittel be handelt. Der Farbstoff stellt ein orangerotes Pul ver dar, löst sich in Wasser mit gelboranger Farbe und wird von Schwefelsäure mit blauvioletter Farbe aufgenommen. Er färbt Baumwolle in rein gelborangem Farbton. PATENT CLAIM: Process for the preparation of an alkali-true stilbene dye, characterized in that the yellow-orange condensation product, which can be obtained by condensation of pp'-dinitrostilbene-oö -disulfonic acid with sulfanilic acid-azo-m-toluidine, is obtained with an oxidizing agent be treated. The dye is an orange-red powder, dissolves in water with a yellow-orange color and is absorbed by sulfuric acid with a blue-violet color. It dyes cotton in a pure yellow-orange shade. die Färbungen sind alkaliechter und klarer als diejenigen des Ausgangsmaterials. the colorations are more alkaline and clearer than those of the starting material.
CH141766D 1929-01-17 1929-01-17 Process for the preparation of an alkaline cotton dye of the stilbene series. CH141766A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH141766T 1929-01-17
CH125479T 1929-01-17

Publications (1)

Publication Number Publication Date
CH141766A true CH141766A (en) 1930-08-15

Family

ID=25710492

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141766D CH141766A (en) 1929-01-17 1929-01-17 Process for the preparation of an alkaline cotton dye of the stilbene series.

Country Status (1)

Country Link
CH (1) CH141766A (en)

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